Right. This will hopefully teach you how to make a back button or link.

For the link you might as well just copy this code:
Code:
<a href="javascript history(-1)">Back</a>
For the button you might as well just copy this code as well:
Code:
<input type="button" value="Go Back" onclick="history.back(-1)">
I Hope this is of some use to you - even if it is a short tutorial.